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//Fluid Systems- By Shiv Kumar
//Chapter 5- Francis Turbine
//Example 5.13
//To Determine the Blade Angle at Entry and Exit.
clc
clear
//Given Data:-
R=0.6; //Degree
ui=15; //Peripheral velocity of Runner at entry, m/s
Vfo=3.2; //m/s
Vfi=Vfo;
Vo=Vfo;
//As the Diameter of rotor at entry is Twice that at exit,
Do_by_Di=2;
//Computations:-
Vwi=(1-R)*2*ui; //m/s
beta_i=180-atand(Vfi/(ui-Vwi)); //degrees
uo=ui/Do_by_Di; //Velocity of Runner at Outlet, m/s
beta_o=atand(Vfo/uo); //degrees
//Results:-
printf("The Blade Angle at Entry, beta_i=%.2f Degrees\n",beta_i) //The Answer Vary due to Round off Error
printf("The Blade angle at Exit, beta_o=%.3f Degrees \n",beta_o)
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